<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">

    </div>
    <script src="./src/react.js"></script>
    <script src="./src/react-dom.js"></script>
    <script src="./src/babel.js"></script>
    <script type="text/babel">
        class Myinput extends React.Component {
            constructor() {
                super()
                this.input = React.createRef()
            }
            jia=()=>{
                console.log(this.input.current.value);
                console.log(document.getElementById('input').value);
                
            }
            render() {
                return (
                    <div>
                       <input type="text" ref={this.input} id="input"/>
                       <button onClick={this.jia}>提交</button>
                    </div>
                )
            }
        }
        ReactDOM.render(
           <Myinput/>,
            document.getElementById('app')
        );
    </script>
</body>

</html>